Knowledge Bank

The $N2$$H+$ -Ar complex has been studied by means of IR photodissociation spectroscopy in a tandem mass $spectrometerm$ in the region between 2500 and $6000cm-1$. More than 25 bands have been found, 14 of them are at least partly rotationally resolved. Rotational analysis shows that the complex has linear proton-bound geometry. Some bands in the low frequency region have an unusual structure. Transitions into levels below certain J^{\prime} are completely absent because the upper states are below the lowest dissociation threshold. This observation allowed for an accurate determination of the binding energy of complex, $D0=2781.5\pm 1.5cm-1$.